5 Answers:

Unfortunately, even with maximum protection ( high quality mattress protector), good foundation and support, and rotation (not flipped), the i Comfort Genius mattress that we purchased in April 2014 is not sleep worthy and has "craters" that have our body impressions. It has not lived up to the expectations. It is very frustrating to be in the position to mattress shop so soon.

While this mattress is made to be one sided, the underside is usable....and firmer.
Many of my customers, in order to salvage the money spent on a bad mattress, will flip their one sided mattresses over and add an all-natural Talalay latex mattress topper.
Unlike the memory foam on the topside of your mattress, latex sleeps cool and is a whole lot more resilient.

iSeries mattress are not bad mattresses, they are amongst the best available today. Just ask the unbiased Consumer Reports organization. GoodBed Help answered your question correctly - iSeries mattresses are one-sided and are not designed to be used on the bottom side.